In humans, differences in personalities have been evident since the ancient times. Personality in animals has long been ignored, but recently this question has received increasing research interest as ...

The human facial action coding system, or FACS, has been developed as a tool for cross-species systematic comparisons of facial muscles to help interpret the resulting facial expressions of the common ...

Add Yahoo as a preferred source to see more of our stories on Google. common marmoset monkey, Callithrix jacchus Marmosets are small, adorable monkeys native to South America, but it would be unwise ...

A large number of cells within the brains of marmosets actually come from their siblings, potentially influencing their behaviour – and the same may be true of human fraternal twins. We already know ...